text: It is a little bit different to calculate grams to teaspoons. For this table, it is easier to use the âeasy calculationâ of 4 grams of sugar per tsp. It means that 1 gram of sugar equals to 0.25 or Â¼ of a teaspoon. Remember that you can keep calculating on your own by multiplying the number of grams by 0.25. For example, for 32 grams of sugar you would take 32 x 0.25, which would equal to 8 teaspoons.